TI-ISO1643.pdf
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ISO164x Hot-Swappable Bidirectional I2C Isolators with Enhanced EMC and GPIOs
1 Features
• Robust Isolated Bidirectional, I
2
C Compatible,
Communication
– ISO1640: Bidirectional SDA and SCL
communication
– ISO1641: Bidirectional SDA and unidirectional
SCL communication
– ISO1642/3/4: Bidirectional SDA and SCL
communication with either 2 or 3 unidirectional
GPIO channels
– Hot-Swappable SDA and SCL
• Bidirectional data transfer up to 1.7 MHz Operation
• Up to 3 additional unidirectional isolated GPIO
channels supporting 50 Mbps speed
• Robust isolation barrier with enhanced EMC:
– >100-year projected lifetime at 450 V
RMS
working voltage (D-8) and 1500 V
RMS
working
voltage (DW-16)
– Up to 5000 V
RMS
isolation rating per UL1577
– Up to 10 kV reinforced surge capability
– ±100 kV/μs typical CMTI
– ±8 kV IEC-ESD 61000-4-2 contact discharge
protection across isolation barrier
– Same side ±8 kV IEC-ESD unpowered contact
discharge on SCL2 and SDA2 (Side 2)
• Supply range: 3 V to 5.5 V (Side 1) and 2.25 V to
5.5 V (Side 2)
• Open-drain outputs with 3.5-mA (Side 1) and 50-
mA (Side 2) current-sink capability
• Max capacitive load: 80 pF (Side 1) and 400 pF
(Side 2)
• 16-SOIC (DW-16) and 8-SOIC (D-8) Package
Options
• –40°C to +125°C Operating Temperature
• Safety-Related Certifications (planned):
– UL 1577 Component Recognition Program
– DIN VDE V 0884-11
– IEC 62368-1, IEC 61010-1, IEC 60601-1 and
GB4943.1-2011 certifications
2 Applications
• Isolated I
2
C Buses
• Isolated I
2
C and SPI Buses
• SMBus and PMBus Interfaces
• Power Over Ethernet (PoE)
• Motor Control Systems
• Battery Management
.
3 Description
The ISO1640, ISO1641, ISO1642, ISO1643 and
ISO1644 (ISO164x) devices are hot swappable, low-
power, bidirectional isolators that are compatible
with I
2
C interfaces. The ISO164x supports UL 1577
isolation ratings of 5000 V
RMS
in the 16-DW package,
and 3000 V
RMS
in the 8-D package. Each I
2
C
isolation channel in this low emissions device has
a logic input and open drain output separated by
a double capacitive silicon dioxide (SiO
2
) insulation
barrier. The ISO1642 and ISO1643 intregrates 2
unidirectional CMOS isolation channels, while the
ISO1644 intregrates 3 unidirectional CMOS isolation
channels which can be used for static GPIO isolation
or to isolate a Serial Peripheral Interface (SPI) bus.
This family includes basic and reinforced insulation
devices certified by VDE, UL, CSA, TUV and CQC.
The ISO1640/2/3/4 have two isolated bidirectional
channels for clock and data lines and the ISO1641
has a bidirectional data and a unidirectional clock
channel. The ISO164x family integrates logic required
to support bidirectional channels, providing a much
simpler design and smaller footprint when compared
to optocoupler-based solutions.
Device Information
(1)
PART NUMBER PACKAGE BODY SIZE (NOM)
ISO1640BD
ISO1641BD
SOIC (8) 4.90 mm × 3.91 mm
ISO1640DW
ISO1641DW
ISO1642DW
ISO1643DW
ISO1644DW
SOIC (16) 10.30 mm × 7.50 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Isolation Options
PART NUMBER ISO164xBD ISO164xDW
Protection Level Basic Reinforced
Surge Test Voltage 6500 V
PK
10000 V
PK
Isolation Rating 3000 V
RMS
5000 V
RMS
Working Voltage
450 V
RMS
/ 637
V
PK
1500 V
RMS
/ 2121
V
PK
ISO1640, ISO1641, ISO1642, ISO1643, ISO1644
SLLSFC2D – DECEMBER 2020 – REVISED SEPTEMBER 2021
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.
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